/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

lexer grammar ModeLexer;

import Symbol, PostgreSQLKeyword, Keyword, Comments, Literals;

BEGIN_DOLLAR_STRING_CONSTANT
   : '$' TAG? '$'
   {pushTag();} -> pushMode (DOLLAR_QUOTED_STRING_MODE)
   ;

fragment TAG
   : IDENTIFIER_START_CHAR_ STRICT_IDENTIFIER_CHAR_*
   ;

mode DOLLAR_QUOTED_STRING_MODE;

DOLLAR_TEXT
   : ~ '$'+
   | '$' ~ '$'*
   ;

END_DOLLAR_STRING_CONSTANT
   : ('$' TAG? '$')
   {isTag()}?
   {popTag();} -> popMode
   ;
